Beyond3D - Origin of Quake3's Fast InvSqrt()Published on 29th Nov 2006, written by Rys for Software - Last updated: 21st Mar 2007 Introduction Note! This article is a republishing of something I had up on my personal website a year or so ago before I joined Beyond3D, which is itself the culmination of an investigation started in April 2004. So if timeframes appear a little wonky, it's entirely on purpose! One for the geeks, enjoy. To most f
